Zener tunneling of light waves in an optical superlattice
Anno: 2005
Autori: Ghulinyan M., Oton C.J., Gaburro Z., Pavesi L., Toninelli C., Wiersma D.S.
Affiliazione autori: Univ Trent, Dept Phys, I-38050 Trento, Italy; INFM, I-38050 Trento, Italy;
European Lab Nonlinear Spect, I-50019 Florence,
Italy;
INFM MATIS, I-50019 Florence, Italy
Abstract: We report on the observation of Zener tunneling of light waves in spectral and time-resolved transmission measurements, performed on an optical superlattice made of porous silicon. The structure was designed to have two photonic minibands, spaced by a narrow frequency gap. A gradient in the refractive index was introduced to create two optical Wannier-Stark ladders and, at a critical value of the optical gradient, tunneling between energy bands was observed in the form of an enhanced transmission peak and a characteristic time dependence of he transmission.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 94 (12) Da Pagina: 127401-1 A: 127401-4
Parole chiavi: semiconductor superlattices; induced delocalization; bloch oscillations; stark-ladder; breakdownDOI: 10.1103/PhysRevLett.94.127401Citazioni: 124dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-10-27Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)